User Scheduling for Cooperative Base Station Transmission Exploiting Channel Asymmetry
| Autor: | Mats Bengtsson, Chenyang Yang, Shengqian Han |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
FOS: Computer and information sciences
Engineering business.industry Information Theory (cs.IT) Computer Science - Information Theory Cellular radio Mobile antennas Real-time computing Data_CODINGANDINFORMATIONTHEORY Data rate Communications system Scheduling (computing) Base station Telecommunications link Electrical and Electronic Engineering business Channel asymmetry Computer network |
| Zdroj: | IEEE Transactions on Communications. 61:1426-1435 |
| ISSN: | 0090-6778 |
| DOI: | 10.1109/tcomm.2013.020413.110188 |
| Popis: | We study low-signalling overhead scheduling for downlink coordinated multi-point (CoMP) transmission with multi-antenna base stations (BSs) and single-antenna users. By exploiting the asymmetric channel feature, i.e., the path-loss differences towards different BSs, we derive a metric to judge orthogonality among users only using their average channel gains, based on which we propose a semi-orthogonal scheduler that can be applied in a two-stage transmission strategy. Simulation results demonstrate that the proposed scheduler performs close to the semi-orthogonal scheduler with full channel information, especially when each BS is with more antennas and the cell-edge region is large. Compared with other overhead reduction strategies, the proposed scheduler requires much less training overhead to achieve the same cell-average data rate. |
| Databáze: | OpenAIRE |
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